1284734409 has 16 divisors (see below), whose sum is σ = 1958191488. Its totient is φ = 733946112.

The previous prime is 1284734383. The next prime is 1284734417. The reversal of 1284734409 is 9044374821.

It is not a de Polignac number, because 1284734409 - 2⁷ = 1284734281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1284734449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154219 + ... + 162335.

It is an arithmetic number, because the mean of its divisors is an integer number (122386968).

Almost surely, 2^1284734409 is an apocalyptic number.

It is an amenable number.

1284734409 is a deficient number, since it is larger than the sum of its proper divisors (673457079).

1284734409 is an equidigital number, since it uses as much as digits as its factorization.

1284734409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15664.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 1284734409 is about 35843.1919477047. The cubic root of 1284734409 is about 1087.1040623909.

The spelling of 1284734409 in words is "one billion, two hundred eighty-four million, seven hundred thirty-four thousand, four hundred nine".